CN109383334B

CN109383334B - Device and method for adjusting a seat

Info

Publication number: CN109383334B
Application number: CN201810889492.2A
Authority: CN
Inventors: B·罗马
Original assignee: Faurecia Automotive GmbH
Current assignee: Faurecia Automotive GmbH
Priority date: 2017-08-07
Filing date: 2018-08-07
Publication date: 2022-06-17
Anticipated expiration: 2038-08-07
Also published as: US10850640B2; DE102017117847A1; US20190039482A1; CN109383334A

Abstract

The invention relates to a vehicle seat with an adjusting device, comprising a base part, an accessory, wherein the accessory can be moved relative to the base part, and at least two guide elements, wherein the guide elements have receptacles which are suitable for at least partially receiving the base part or the accessory, and wherein the guide elements are mounted in mounting locations of the base part and/or the accessory, wherein the vehicle seat has two guide elements for preventing a rotational movement of the accessory relative to the base part. The invention also relates to a corresponding method for adjusting a vehicle seat.

Description

Device and method for adjusting a seat

Technical Field

The invention relates to a vehicle seat having an adjusting device, having a base part, an attachment part, wherein the attachment part can be moved relative to the base part, and having a guide element, and to a corresponding method for adjusting a vehicle seat.

Background

Many modern vehicle seats for automobiles are equipped with several components for individually adjusting at least one portion of the seat for the person sitting therein. Such adjustable portions are for example adjustable lumbar supports, adjustable lateral or back supports or massage functions. Seats that offer the user the possibility of adjusting at least one part of the seat are applied in modern cars in order to increase the comfort of the user. This is particularly important when the user is resting on the seat for a longer period of time. Passenger seats are for example car seats, bus seats or aircraft seats. In order to accommodate different passenger sizes, it is important to use a seat capable of adjusting the size of a seat cushion in the above-described vehicle. This can be achieved by raising the seat bottom frame and/or reducing the seat cushion length (depth). In this case, the seat cushion can be adjusted to the depth of the user, who supports his femur on the seat cushion. The utility model specification DE 202013102108U 1 describes such an adjusting device.

Such adjustment may be manual or motor driven. The ease of use is increased by means of a motor-driven adjusting device. The user can simply control the motor-driven adjustment device via the controller. The seat can also automatically assume the preset position. Such a motor-driven seat depth adjustment device is described, for example, in WO 002015113633.

Generally, a seat depth adjusting apparatus is composed of a slide base on which a seat surface is mounted and a seat frame connected with the remaining seats. The slide and the seat frame have common guides, by means of which the slide and the seat frame are pressed against each other. The main problems based on manufacturing tolerances, i.e. the parts that can move relative to each other, and the freedom (play) around the vertical axis (yaw), the vertical axis (rotation) and the horizontal axis (pitch) triggered by deformation by external forces such as the weight and movement of the user. DE 102012108271 a1 describes a seat depth adjustment device which minimizes this degree of freedom by means of a guide. The guide device has a spring arc which generates a high prestress between the carriage and the seat frame, so that gaps are avoided. However, this embodiment results in a high frictional force between the carriage and the guide.

Disclosure of Invention

The adjusting device of the invention is designed in such a way that play around the three axes of movement of the attachment is avoided by a corresponding arrangement and geometry of the guide elements. Furthermore, the friction is in some way significantly reduced, so that much less force is required for adjustment.

In view of the above, it is an object of the present invention to provide an adjusting device which minimizes the play between the attachment and the base part, is simple to produce and is inexpensive, and the actuating force of which is reduced compared to the adjusting devices disclosed hitherto.

The vehicle seat with the adjusting device according to the invention is formed by a base part and an accessory. The attachment serves to separate and move a portion of the seat from the rest of the seat relative to the base member. The portion is mounted on the attachment and can be moved by the user to another position, for example to achieve a more comfortable seat position. The base part is connected firmly to the rest of the vehicle seat. The attachment can be moved relative to the base part by means of at least two guide elements. In this case, the two guide elements are arranged one after the other with respect to the direction of translation of the accessory relative to the base part. This has the advantage that a rotational movement of the attachment relative to the base part is avoided.

This type of adjustment device is suitable for different purposes. These adjustment means can be used, for example, for the following adjustments:

● guiding a height adjustable head rest (attachment) relative to a seat back (base member)

● front part (attachment) of longitudinally adjustable head rest (base part)

● side parts which can project from the head rest (base part) (accessories; for sleeping)

● guiding armrests (accessories) relative to the vehicle seat (base part)

● guides parts (accessories; e.g. cushioning parts) of armrests (base parts) to free up storage space

●, to project an operating device (accessory; e.g. touch screen) or a cup holder (accessory) from an armrest (base part)

● guiding multimedia devices (accessories; e.g. from back-rest (base part)

● monitor (Accessory) that can be extended from head rest (base part)

● guiding footrests (attachments) that can be extended from the vehicle seat (base part)

In a further aspect of the invention, the vehicle seat with the adjusting device has two guide elements which prevent the degrees of freedom in a lateral direction in such a way that a movement of the attachment about the vertical axis (yaw) is avoided. Yaw movement occurs, for example, when the user reciprocates in the vehicle seat. By avoiding these movements, the comfort of the user is improved.

In a special embodiment of the invention, the two guide elements are arranged diagonally opposite one another in order to avoid yaw movements. This arrangement effectively prevents the accessory from yawing. The user is for example comfortable sitting.

In a further embodiment of the invention, the two guide elements are arranged with a small lateral spacing from one another. The smaller the lateral spacing from each other, the more effectively yaw motion of the attachment is avoided.

In a further embodiment of the invention, the distance between the two guide elements for avoiding yaw movements is less than 80%, preferably less than 60%, particularly preferably less than 40%, of the width of the attachment. The smaller the lateral spacing between the guide elements, the smaller the yaw movement of the attachment.

In a particularly advantageous embodiment of the invention, the motor vehicle seat with the adjusting device has two guide elements which prevent movements of the attachment about a longitudinal axis (rotation) and a transverse axis (pitch). These movements can be generated, for example, by movements of the user and the weight displacement caused thereby.

In a further embodiment of the invention, the two guide elements for preventing rotation and tilting of the attachment are arranged on the side of the attachment. This arrangement effectively prevents rotation and pitch of the attachment.

In a further embodiment of the invention, the two guide elements for preventing rotation and tilting of the attachment are arranged at a relatively large distance from one another. By this arrangement both rotational and pitching movements of the attachment are avoided.

In a further embodiment of the invention, the distance between the two guide elements for preventing rotation and tilting of the attachment is greater than 20%, preferably greater than 30%, particularly preferably greater than 40%, of the length of the attachment. The greater the spacing between the guide elements, the less the rotational and pitching movement of the attachment.

In a further aspect of the invention, the two guide elements for preventing rotation and tilting of the attachment are arranged at a small lateral distance from the lateral edges of the attachment. A small spacing from the side edges of the attachment is essential to avoid rotation and pitching of the attachment.

In a further embodiment of the invention, the lateral distance between the two guide elements for preventing rotation and tilting of the attachment and the lateral edges of the attachment is less than 20%, preferably less than 10%, particularly preferably less than 5%, of the width of the attachment. The arrangement on the edge of the attachment effectively prevents the attachment from rotating and pitching.

In a particularly advantageous embodiment of the invention, four guide elements for preventing rotation and tilting of the attachment are arranged on the side of the attachment. Two guide elements for preventing rotation and pitching of the attachment are positioned on opposite sides of the attachment, thereby forming the corners of a rectangle. The four guide elements for avoiding rotation and pitching of the attachment effectively prevent rotation and pitching of this part.

The guide element according to the invention, which is used in a motor vehicle seat, has a circular cross section at least in some regions. Wherein this cross section is perpendicular to the direction of movement of the accessory. By reducing the frictional forces between the guide element and the bearing point by means of this shape of the guide element, the vehicle seat with the adjusting device according to the invention requires less force. By this arrangement a relative movement between the accessory and the base part is achieved. In this case, it is not important for this relative movement whether the guide element accommodates the accessory or the base part in the accommodation.

In a further embodiment of the invention, the receptacle of the guide element for application to the vehicle seat is embodied in such a way that it has a recess. The accessory and/or base part can be inserted into this recess without any effort. The weight of the attachment and/or the base part results in a stable connection of the guide element to the attachment and/or the base part, which can be implemented simply and inexpensively in existing adjusting devices.

In a further aspect of the invention, the guide element for a vehicle seat is designed in such a way that the depth of the recess is greater than 50%, preferably greater than 60%, particularly preferably greater than 75%, of the width of the recess.

The method of adjusting a vehicle seat according to the invention is designed in such a way that a relative movement of an accessory of the vehicle seat relative to the base part is achieved. This relative movement is achieved by means of guide elements supported in the guide device. Wherein the guide elements are embodied in such a way that they can be moved during the relative movement about an axis parallel to the direction of movement of the relative movement. These guide elements absorb forces by weight displacement, for example by the movement of the user, which forces are compensated by this arrangement.

The guide element has a receptacle which is designed in such a way that it can receive the base part and/or the accessory. The guide element is mounted in a mounting point of the base part and/or the attachment and enables such a relative movement between the attachment and the base part. Whether the guide element accommodates the accessory or the base part in this accommodation is not critical for this relative movement. The guide element and the bearing point of the attachment or the base part have an at least partially circular cross section. The vehicle seat with the adjusting device according to the invention requires comparatively little effort compared to the solutions disclosed hitherto, by the substantially spherical or spherical guide element significantly reducing the friction between the guide element and the bearing point.

In an advantageous embodiment of the invention, the motor vehicle seat has a motor-driven adjustment part for carrying out a relative movement between the attachment part and the base part. The motor-driven adjustment portion has several advantages over a manual adjustment portion. The comfort of the user is improved. Furthermore, the user can automatically move the car seat to the position most comfortable for him via the interface. Depending on the embodiment, the other parts of the vehicle seat can be adjusted supplementarily by this motor-driven adjustment.

In a further embodiment of the invention, the motor-driven adjustment unit has a spindle drive. This spindle can be of a flexible embodiment and is not susceptible to forces transverse to the spindle. Therefore, the spindle drive mechanism can be reliably operated even under difficult conditions.

In a further embodiment of the invention, the guide element is rotatably mounted in the base part and/or the attachment. The rotatable support reduces the clearance between the guide member and its support against longitudinal or transverse forces.

In a further embodiment of the invention, the curvature of the cross section of the guide element is identical at least in some regions to the curvature of the cross section of the bearing point. This geometry ensures that the play between the guide element and the bearing point is minimized and at the same time lateral forces are compensated for.

Embodiments of the inventive sensor device and of the inventive method are schematically illustrated in a simplified manner in the figures, which are explained in detail in the following description.

Drawings

In the figure:

FIG. 1 shows an arrangement of two successive guide elements

FIG. 2 shows an arrangement of two juxtaposed guide elements

FIG. 3 is a plan view of an arrangement of guide elements for avoiding rotation and pitching

FIG. 4 is a plan view of an arrangement of guide elements for avoiding yaw movements

FIG. 5 shows a guide member having a spherical surface

a) Front view

b) Side view of the device

Fig. 6 shows a guide element with a spherical surface, side edges and groove parts

a) Front view

b) Side view of the device

c) Plan view of

Fig. 7 shows a guide element mounted in a mounting region of a seat frame, with components of a slide in a receptacle of the guide element

Fig. 8 shows a guide element mounted in a mounting region of a carriage, with components of a seat frame in a receptacle of the guide element

Detailed Description

Fig. 1 shows an arrangement in which the attachment 11 is guided on one side of the attachment 11 by two guide elements 1 during the translational movement during adjustment. The guide elements 1 are arranged in succession. The accessory 11 is inserted into the guide member 1. This enables a relative movement between the attachment 11 and the base part 10 in a horizontal line. The play of the attachment 11 relative to the base 10 is significantly minimized by this arrangement. Since the guide element 1 can perform a rotational movement around an axis parallel and perpendicular to the direction of movement, flexibility is maintained while ensuring this clearance and the quality perceived thereby by the user.

To avoid yaw movements (rotation of the attachment 11 about the vertical axis), the two guide elements 1 are arranged substantially diagonally (fig. 2). Yaw motions occur when the user moves, for example, back and forth in the vehicle seat. When this yaw movement is minimized, the user is more comfortable to sit. The attachment 11 is connected to the guide element 1 by means of two guide rails 13, said attachment being able to execute a movement relative to the base part 13 and, for example, to change the length of the seat base in some way. The lateral spacing between the guide elements 1 is selected in such a way that this spacing is as small as possible, particularly preferably less than 40% of the width of the appendage 11. The smaller the lateral spacing between the guide elements, the smaller the yaw movement of the attachment.

The seat depth adjusting means 9 (fig. 3) can be operated by a motor-driven adjusting portion. The motor-driven adjustment portion has several advantages over a manual adjustment portion. The comfort of the user is improved. The user can automatically move the vehicle seat, for example, to the most comfortable position for him via the interface. Furthermore, other parts of the vehicle seat, such as the backrest, can be moved by this motor. The motor 14 drives the seat frame 10 via the spindle 15 and the connecting element 16 and moves this seat frame relative to the slide 11. The main shaft 15 can be of a flexible embodiment and will also work reliably with forces transverse to this main shaft. In the present embodiment, to avoid rotation and pitching movements, the four guide elements 1 are arranged in such a way that they substantially form the corners of a rectangle. These rotational and pitching movements can be generated, for example, by the movement of the user and the weight displacement caused thereby. The seat frame is connected to the guiding element 1 by means of two guide rails 12 on the seat frame. The guide elements 1 are arranged with the greatest possible spacing from one another, which is particularly preferably greater than 40% of the length of the carriage 11. Furthermore, the guide element 1 is close to the edge of the slide 11. The greater the spacing of the guide elements from each other and the closer the guide elements are to the edge of the carriage 11, the less the rotational and pitching movement of the carriage 11.

Fig. 4 shows an arrangement of the guide element 1 for avoiding a yaw movement of the seat adjusting device 9. In the present embodiment, a motor 14 drives the slide 11 via a spindle 15 and a connecting element 16 and moves this slide relative to the seat frame 10. The carriage 11 is connected to the two guide elements 1 by means of two guide rails 13. The guide elements 1 are arranged diagonally with the greatest possible spacing from one another, but at the same time with a smaller lateral spacing. This arrangement minimizes yaw motion.

According to the invention (fig. 5a, b), the guide element 1 has an arched surface 2 and in the described embodiment has a substantially spherical construction. This shape ensures that the guide element 1 can be rotatably supported in all directions and reduces the friction between the guide element 1 and the bearing point 7 of the guide element 1. The guide element 1 has a receptacle 4. The receptacle 4 has a grooved shape and has two curved faces 3.1, 3.2, which transition into the body of the guide element 1. Elements or components of the seat frame 10 or the slide 11 can be inserted into the trough-like accommodation 4.

Fig. 6 shows a further exemplary embodiment of the guide element 1. Compared to the previous embodiments, the guide element 1 has sides 6.1, 6.2 which extend the length of the guide element 1 and thus better attach the accessory in the pocket-like receptacle 4. Furthermore, the gap is reduced by the extended receptacle. The groove portion 5 extends the depth of the groove-like accommodating portion 4. Fig. 6 a) is a front view, fig. 6 b) is a side view, and fig. 6 c) is a top view.

Fig. 7 shows a guide element 1 which is mounted in a bearing point 7 in the base part 10 in such a way that the guide element 1 can be rotated about its transverse axis (in the translational direction of the attachment). In this case, the bearing point 7 is designed such that the radius of its concave curved surface 8.1, 8.2 is approximately equal to the radius of the curved surface 2.1, 2.2 of the guide element, so that the guide element 1 has only a small clearance. The guide element 1 receives the accessory 11 by means of the trough-like accommodation 4 and enables such a relative movement between the accessory 11 and the base part 10. The housing 4 has a greater depth than the standard (i.e. according to the structural plan) penetration depth of the accessory 11. In this way, it is possible to compensate for manufacturing tolerances or deformations in this direction without impairing the ability of the attachment 11 to move relative to the base part 10 and without the attachment 11 and the base part 10 becoming wedged against each other. The direction of movement of the relative movement between the base part 10 and the appendage 11 is perpendicular to the section of the guide element 1. The guide element 1 can likewise be mounted in the attachment 11. In this case, the groove 4 of the guide element 1 accommodates the base part 10.

Fig. 8 shows a further arrangement of the guide element 1. The guide element 1 is here mounted in such a way that the opening of the accommodation 4 is oriented upwards. The guide elements are arranged in the bearing points 7 of the base part 10. This bearing point has concavely curved spherical surfaces 8.1, 8.2 which serve as sliding surfaces for the guide element 1. The guide element 1 has convexly curved spherical surfaces 2.1, 2.3 corresponding to the curved surfaces 8.1, 8.2 of the bearing point 7. The appendage 11 is embodied in such a way that it is bent downwards at a substantially right angle at the end of the accommodation 4 introduced into the guide element 1. The receiving portion 4 of the guide element 1 is provided with an additional groove portion 5, which extends the receiving portion 4 to a protruding spherical cross-section. The length of the groove-like receptacle 4 is selected in such a way that the attachment 11 does not abut against the end of the receptacle 4 or the groove 5, but a small gap remains between the attachment 11 and the groove 5. This compensates for changes in the length of the attachment 11 due to loading, for example due to the weight of the user. Furthermore, the receiving portion 4 has curved faces 3.1, 3.2 on its upper edge, which facilitate the insertion of the accessory 11 into the trough-like receiving portion 4. With this arrangement it is possible to compensate for manufacturing tolerances and deformations due to use and/or load, both in the direction of the opening of the housing 4 and by rotation about an axis parallel or perpendicular to the direction of movement of the accessory 11.

List of reference numerals

1 guide element

2. 2.1, 2.2' spherical surface/guide element section

3.1, 3.2 curved receptacles

4 locus of containment

5 groove part

6.1, 6.2 sides

7 bearing point

8.1, 8.2 surface/form of cross-section of the bearing point of the inner ball

9 adjusting device

10 base part

11 Accessories

12 guide rail on seat frame

13 guide rail on the slide

14 motor

15 Main shaft

16 connecting element

Claims

1. A vehicle seat with an adjusting device (9) comprises

A base part (10) for supporting a load,

an attachment (11) for attaching the device to a vehicle,

wherein the attachment (11) is movable relative to the base part (10),

at least two guide elements (1),

wherein the surface of the guide element (1) has a spherical shape in a partial region,

wherein the guide element (1) has a receptacle adapted to at least partially receive the base part (10) or the accessory (11), and

wherein the guide element is supported in a support point (7) of the base part (10) and/or the attachment (11),

it is characterized in that the preparation method is characterized in that,

the two guide elements (1) are arranged in succession with respect to the direction of translation of the appendage (11) relative to the base component (10).

2. The vehicle seat with an adjusting device (9) according to claim 1,

it is characterized in that the preparation method is characterized in that,

the two guide elements (1) are arranged with a small lateral distance sA from one another.

3. The vehicle seat with an adjusting device (9) according to claim 2,

it is characterized in that the preparation method is characterized in that,

the distance sA between the guide elements (1) is less than 80% of the width of the attachment (11).

4. The vehicle seat with an adjusting device (9) according to claim 2,

it is characterized in that the preparation method is characterized in that,

the distance sA between the guide elements (1) is less than 60% of the width of the attachment (11).

5. The vehicle seat with an adjusting device (9) according to claim 2,

it is characterized in that the preparation method is characterized in that,

the distance sA between the guide elements (1) is less than 40% of the width of the appendage (11).

6. The vehicle seat with an adjusting device (9) according to one of claims 1 to 5,

it is characterized in that the preparation method is characterized in that,

the ratio sA/lA of the lateral spacing sA between the guide elements (1) to the spacing lA between the guide elements (1) in the direction of translation is less than or equal to 1.5.

7. The vehicle seat with an adjusting device (9) according to one of claims 1 to 5,

it is characterized in that the preparation method is characterized in that,

the ratio sA/lA of the lateral spacing sA between the guide elements (1) to the spacing lA between the guide elements (1) in the direction of translation is less than or equal to 1.

8. The vehicle seat with an adjusting device (9) according to one of claims 1 to 5,

it is characterized in that the preparation method is characterized in that,

the ratio sA/lA of the lateral spacing sA between the guide elements (1) to the spacing lA between the guide elements (1) in the direction of translation is less than or equal to 0.5.

9. The vehicle seat with an adjusting device (9) according to claim 1,

it is characterized in that the preparation method is characterized in that,

the vehicle seat has two guide elements (1) for preventing a tilting and/or rotational movement of the attachment (11) relative to the base part (10).

10. The vehicle seat with an adjusting device (9) according to claim 9,

it is characterized in that the preparation method is characterized in that,

the two guide elements (1) are arranged on the side of the attachment (11).

11. The vehicle seat with an adjusting device (9) according to claim 9 or 10,

it is characterized in that the preparation method is characterized in that,

the two guide elements (1) are arranged at a large distance from one another with respect to the direction of translation of the adjusting device (9).

12. The vehicle seat with an adjusting device (9) according to claim 11,

it is characterized in that the preparation method is characterized in that,

the spacing between the guide elements (1) is greater than 20% of the length of the appendage (11).

13. The vehicle seat with an adjusting device (9) according to claim 11,

it is characterized in that the preparation method is characterized in that,

the spacing between the guide elements (1) is greater than 30% of the length of the appendage (11).

14. The vehicle seat with an adjusting device (9) according to claim 11,

it is characterized in that the preparation method is characterized in that,

the spacing between the guide elements (1) is greater than 40% of the length of the appendage (11).

15. The vehicle seat with an adjusting device (9) according to claim 9,

it is characterized in that the preparation method is characterized in that,

the two guide elements (1) are arranged at a small lateral distance from the lateral edges of the attachment (11).

16. The vehicle seat with an adjusting device (9) according to claim 15,

it is characterized in that the preparation method is characterized in that,

the spacing between the guide element (1) and the side edges of the appendage (11) is less than 20% of the width of the appendage (11).

17. The vehicle seat with an adjusting device (9) according to claim 15,

it is characterized in that the preparation method is characterized in that,

the spacing between the guide element (1) and the side edges of the appendage (11) is less than 10% of the width of the appendage (11).

18. The vehicle seat with an adjusting device (9) according to claim 15,

it is characterized in that the preparation method is characterized in that,

the spacing between the guide element (1) and the side edges of the appendage (11) is less than 5% of the width of the appendage (11).

19. The vehicle seat with an adjusting device (9) according to claim 9,

it is characterized in that the preparation method is characterized in that,

four guide elements (1) are arranged on the side of the attachment (11), two guide elements (1) each being arranged on each side of the attachment (11).

20. The vehicle seat with an adjusting device (9) according to claim 1,

it is characterized in that the preparation method is characterized in that,

the vehicle seat has a motor-driven adjustment part (14) for carrying out a relative movement between the attachment (11) and the base part (10).

21. The vehicle seat with an adjusting device (9) according to claim 20,

it is characterized in that the preparation method is characterized in that,

the motor-driven adjustment unit (14) has a spindle drive mechanism (15).

22. A method of adjusting a car seat according to any one of claims 1 to 21:

-moving an accessory (11) of the car seat relative to a base part (10) of the car seat,

guiding the movement of the attachment (11) relative to the base part (10) by means of a guiding element (1),

it is characterized in that the preparation method is characterized in that,

guiding the movement of the base part (10) relative to the attachment (11) by means of the guiding element (1),

wherein the surface of the guide element (1) has a spherical shape in a partial region.

23. The method of adjusting a vehicle seat according to claim 22,

it is characterized in that the preparation method is characterized in that,

during the relative movement of the attachment (11) with respect to the base part (10), the guide element (1) can be moved about an axis parallel to the direction of movement of the relative movement.

24. The method of adjusting a vehicle seat according to claim 22 or 23,

it is characterized in that the preparation method is characterized in that,

during the relative movement of the attachment (11) with respect to the base part (10), the guide element (1) can be moved about an axis transverse to the direction of movement of the relative movement.